Smoke cleaning device



Oct. 4, 1932. 1 MlTcHELL 1,881,058

SMOKE CLEANING DEVICE Filed Oct. l. 1930 wirr /NI/E/V TOR Maw TTONEY 'hazard and preventing Patented Oct. 4, 1932 UNITD As'm TES APzSJIEm*4 orticav 'JOSEPHk MlTCHELLOFSEATTLE, WASHINGTON Y SMOKE CLEANXNG'DEVICE ppli'caton filed October 1, 1930. Serial 485,6i5.v

Y stacks or burners.

Another primaryobject of the invention is to providev a sootandcinder arrester of this n'aturewhich, is n t easily clogged and which is readily cleaned Y sparks and soot and cinders and other solid matter anddischarge Vthe same back down into the flue, thus greatly" reducing the tire the pollutionjof the p adjacent atmosphere with ashesanddust. i

I `-Yto provideajso'ot and ,cinder y'arrester in the A further yobjecty is to provide afs'oot and cin'der arrester lot'this nature which isnot expensive toV ymarnutacture1 and which is high- Iieriod of time under constant use at 'high temperatures. i g

More specificA objects of the invention are l l form of an inverted dome of heat resistant vmaterialY supported over the top of a' flue or burner, the internal diameter of said domek at the bottom being substantially larger than theeXternal diameter of the' top of the flue v y,whereby smoke and gases will be directed downwardly andoutwardly around the top of said flue and said dome having an internal i, annular downwardly inclined guard member positioned abovel the top of the iiue to direct the solid matter back into the flue and further having screens for intercepting. discharging solid matter, said screens .being arranged so that they may beldumpedby means operable J from the' bottomaof the stack or ue, thebotl tomof the dome Vterminating substantially in the'plane of thetopiof theflue.

'r Other and more specific' objects ofthe'in- 'ventionlwillbe apparent fromfthe following and which will` catch thel burner'.A v

trom' the smoke which issues from large smoke stacks or tlues, especially those used -in corii'iecti'oi'i with `industrial 'establishjments, astlie iues of refuse burners of saw mills and the stacks lof smelters', power plants, heating plants and the like, is often Vvery serious lThe smoke and gasesisfsuing 'romthe stacks are Otten laden with sparks and red hot cinders which are a dire menace "in, the vicinity and with soot, ashes, line dust andthe like which pollutes the air and is injurieus to plant andy animal life and soils everything with which it comes in contact. This smoke, as it issues from the top ofthe flue or burner, is yoften very hotand will 'quickly burn out any metal guards or parts,`Y with which it comes" in contact thus making 'it substantially impossible to provide a` successful metal device for cleaning the solid matter out of the smoke. Another problem 4 infconnection with the construction oit a sucresistant'to heat and will last for a` long cessful device of this nature is to provide a,

Vsmoke cleaner which will remove the solid substantially impairing the draft efficiency of the stack'or `burner onwhich it is inf stalled. My invention overcomesall ol the diliiculties hereinbetore pointed out by providing aV smoke cleaning device which will remove substantially all of the solid vmatter from the smoke without substantially impairing the draft and whichy maybe oonstructed ot materials which are highly rec sistant to heat thus making a device `which will last for a long period of time without burning out.

In the accompanying dra-wing Figure l is a view Vin vertical section, substantially on a'broken line 1-1 of Fig. 2f', ot asmoke cleaning device constructed in accordance with invention as the same may appear 'when installed on the top of a smoke stack or Fig.` 2 isA a horizontal section of the same substantially' on broken line 2*-2 of Fig. l,

sired, will protect the fire bricks 7 against weathering and add tothe strength of the dome. 4

ing drawing clearly disclose a preferred em-y bodiment of my invention but it will be un- 'derstood that this disclosure is merely illustrat-ive and that such changes in the invention may be made as are fairly within the scope and spirit of the following claims.

I claim: Y

1. 'In a smoke cleaning device of the class "described, for use in connection with a smoke stack, an inverted bowl shapeddome supported above said smoke stack and having i va bottom diameter greater than the diameter of the smoke stack to afford an opening around the top of the smoke stack through which the smoke may discharge downwardly, an annular guard member extending inwardly and downwardly from the walls of said dome at a distance above said smoke f discharge opening and forming a shelf above said smoke discharge opening, the inner edgel of said guard member being substanti ally flush with the outer edge ofi-the top of said smoke stack whereby solid matter will be deflected toward the top end of said smoke stack and screens 'mounted' for dumping movement and covering said smoke disa charge .opening.

2. In a smoke cleaning device of the class described, for use 4in connection with a smoke stack, an inverted bowl shaped dome supported abovesaid smoke stack and having a bot tom diameter greater'than the diameter of the smoke stack to afford an opening around the top of the smoke stack through which the smoke may discharge downwardly, and

screens mounted for dumping movement and covering said opening. v

3. In a smoke cleaning device of the Yclass described for use in. connection with a smoke stack, an inverted bowl shaped dome supported above the discharge end ofv said smoke stack, said dome being lined with fire brick and the open end of'said dome terminating substantially in the plane of the topl of the stack and being of larger diameter than the stack to leave a smoke discharge opening around the top of said stack, screens covering said opening, means for lifting said screens into dumping position relative t0 smoke discharge opening.

said stack, and an annular guard member extending inwardly and, downwardly rfrom the wall of said dome at a distance above said 4. In a smoke cleaning device of the class described, for use in connection with a smoke stacka bowl shaped fire brick dome supported in inverted position above the discharge end of said smoke stack, the-,open end of Vsaid dome terminating substantially in the plane ofthe top of the stack and being of larger diameter than the stack to leave a smoke discharge.'opening around the top of i said stack, an annular wind deflector at the bottom of said rdome extending below said y, The foregoing description and accompanyf saidstack, downwardly extending operating rods connected with said screens for tilting the samel into dumping position relative to said stack, andv an annular guard member extending inwardly and downwardly from the wall of said dome at a distance above said smoke discharge opening.

5. In a device for removing solid matter from smoke and hot gases, for use in connection with a smoke stack, brackets secured to the top end of said smoke stack and extending outwardly therefrom, a dome support carried by said bracketsa bowl shaped dome supported by said dome support in inverted position over the top end of said smoke stack, the open bottom end of said dome being of larger internal diameter than the exterior of said stack to leave an annular and an annular guard member extending 1nwardly `and downwardly from the wall ofy said dome at a distance above said smoke discharge openings, the inner edge of said guard member overhanging the inner edge of said smoke discharge opening. n

6. In a device for removing solid'matter from smoke and hot gases, for use in connection with a smoke stack, brackets secured to the-top end of said smoke stack and extending outwardly therefrom, an annular dome support of angle shaped cross section' carried by said brackets, a bowl shaped dome carriedby said dome support. in inverted position over the vtop end of said smoke stack,

the open bottom end of said dome being of larger internal diameter than the exterior ofl said stack to leave an annular opening through which the smoke may discharge downwardly, an annular wind guard secured to said dome support and extending below the bottom edge thereof, pivotally mounted screens covering said smoke discharge opening, means for dumping said screens and an annular guard member extending inwardly and downwardly from the wall of said dome at a distance above said smoke discharge openings.

7 In a device for removing solid matter from smoke and hot gases, for use in connection with a smoke stack, a bowl shaped dome supported in inverted position over the top end of said smoke stack to leave a downwardly directed smoke discharge opening around the exterior of said smoke stack said dome being made of fire brick, one layer of said irebrick being substantially longer than` v'c-he adjacet'layers tform' a guardemember V `which extends inwardlygand downwardly at i `a` distance above said smoke discharge openv"fing l:emdfacovering:of concrete'on -the'eXte-, .v 0fsaLdfire'brck.v ,l v :A vIn*testimony Whex'eofl` aix my signature.

, JOSEPHMITCILLL J2e; Y'

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